The architecture seems to be that mgi0 is attached to the 3-port switch for the LAN ports, so they all aggregate under that one interface. bwl0/wlan0 always report the same bits for 2.4G clients, bwl1/wlan1 the same bits for 5G clients. bridge0 bridges between mgi0, bwl0/wlan0, and bwl1/wlan1. I don’t use pppoe, so I can’t confirm what that shows, but I assume it’s the traffic _inside_ the PPPOE session on the WAN, if used. gif0 is 6in4 tunneling, and stf0 is 6to4 tunneling.

The only thing I’m unsure about is the WiFi interfaces are set to 300Mbps/max in this config. I am unclear if this box can do 450Mbps throughput with the right clients.

mgi0 is the WAN.

mgi1 is connected to an internal 4 port GigE switch that appears to not have any individual pollable ports via SNMP. The other three ports are exposed on the back of the unit as the LAN ports.

wlan0/wlan1 are the data connections for the 2.4Ghz and 5Ghz radios, respectively.

bwl0/bwl1 appear to be some sort of managmenet interface for the radios. They report outbound traffic only, never inbound. Traffic on these interfaces increases as traffic increases on the wlan0/wlan1 interfaces, but at a much lower rate.

bridge0 is a software bridge that sits between wlan0, wlan1, and mgi1 briding the WiFi’s and LAN ports together. Traffic between any two of these three will pass the bridge interface.

pppoe0 is for tunneling PPP over Ethernet, if you use that on the WAN port, basically in that case mgi0 would be with PPPoE overhead, and pppoe0 would be without.

gif0 is 6in4 tunneling, if you have for instance a tunnel broker tunnel. Again, this would be traffic with no overhead, then as the packets go out mgi0 they would count there with the tunnel overhead.

sth0 is 6to4 (automatic) tunneling. Again, this would be traffic with no overhead, then as the packets go out mgi0 they would count there with the tunnel overhead.

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